| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 15.8 | 197305280_CLE_CHA |
| Jim Palmer | BAL | 8.65 | 197305290_BAL_KCA |
| Tom Seaver | NYN | 6.73 | 197305290_NYN_SFN |
| Gaylord Perry | CLE | 5.58 | 197305300_CLE_TEX |
| Jim Hunter | OAK | 2.9 | 197305290_OAK_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wayne Simpson | KCA | -4.13 | 197305300_BAL_KCA |
| Pete Broberg | TEX | -2.63 | 197305300_CLE_TEX |
| Johnny Odom | OAK | -2.36 | 197305280_OAK_DET |
| Mike Corkins | SDN | -1.84 | 197305280_WAS_SDN |
| Ron Reed | ATL | -1.78 | 197305300_ATL_PIT |
Based on accumulated WAA for this season up to 1973-05-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.39 | Wilbur Wood | 131.7 | CHA |
| +002+ | 4.48 | Ken Holtzman | 102.3 | OAK |
| +005+ | 3.77 | Tom Seaver | 89.3 | NYN |
| +006+ | 3.36 | Rick Reuschel | 73 | CHN |
| +008+ | 3.17 | Jim Perry | 79.3 | DET |
| +009+ | 3.11 | Bill Singer | 96.7 | ANA |
| +012+ | 2.6 | Don Sutton | 90 | LAN |
| +013+ | 2.59 | Bill Lee | 74.7 | BOS |
| +017+ | 2.49 | Jim Palmer | 78 | BAL |
| +019+ | 2.36 | Ron Bryant | 83.3 | SFN |
| +021+ | 2.33 | Gaylord Perry | 113 | CLE |
| +022+ | 2.27 | Jim Colborn | 73.3 | MIL |
| +024+ | 2.22 | Paul Splittorff | 96.3 | KCA |
| +025+ | 2.17 | Nolan Ryan | 98 | ANA |
| +026+ | 2.17 | Joe Coleman | 92.7 | DET |
| +028+ | 2.07 | Bill Greif | 65.7 | SDN |
| +035+ | 1.82 | Dave McNally | 85 | BAL |
| +037+ | 1.81 | Mel Stottlemyre | 82.3 | NYA |
| +036+ | 1.81 | Alan Foster | 46.3 | SLN |
| +040+ | 1.61 | Jerry Koosman | 70.7 | NYN |
| +044+ | 1.55 | Rollie Fingers | 34 | OAK |
| +046+ | 1.54 | Jack Billingham | 91.3 | CIN |
| +047+ | 1.52 | Ross Grimsley | 71 | CIN |
| +053+ | 1.49 | Bert Blyleven | 91.3 | MIN |
| +055+ | 1.48 | Roric Harrison | 34 | ATL |
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